The 4th Dimension

This will be of not be new to fly fishermen but I can see a 4th dimension beeing entered on boards and that would be the flex caracteristic.

so along with your length/width/thickness would be mid flex or tip flex. For those fly fisherman amoung us that would be mid action or tip action.

Do any of you guys customise the flex according to the rider??

Finally I’m starting to understand this compsand stuff